Turret-lathe.



Patented-Sept. l2, I899. A. SWASEY & H. 'NLLUCAS.

3 Sheets$heet fizz/5172725.

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(Application filed Mar. 27, 1899.)

(No Medal.)

warns PEI'ERS co. Pucrou'mm AEHINGYON u c No. 632 ,9051. Patented Sept. I2, I899. A. SWASEY & H. M. LUCAS.

TURRET LATHE.

(Application filed 1hr. 27, 1899.) (No Model.) 3 Sheets-Sheet 2.

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Patented Sept. 12, I899. A. SWASEY & H. M. LUCAS.

TURRET LATHE.

filed Mar. 27, 1899 3 Sheets-Sheet 3.

(No Model.)

Unrrnn- STATES PATENT Cerise.

Al'i'lBPtOSE SXVASEY AND HENRY M. LUCAS, OF CLEVELAND, OHIO, ASSIGNORS TO IVARNER & SlVASEY, OF SAME PLACE.

TU RRET- LATH E SPECIFICATION forming part of Letters Patent No. 632,905, dated September 12, 1899. Application filed March 27, 1899. Serial No. 710,613. (No model.)

To all whom, it may concern: pose a shaft W, mounted in the slide and Be it known that we, AMBROSE SWASEY and carrying a pinion w, which engages with the HENRY M. LUCAS, citizens of the United rack X, which is fixed to the bed.

States, residing at Cleveland, in the county represents the base-plate of the turret, 5 of Cuyahoga and State of Ohio, have invented which is rotatably mounted upon the turretacertain newand useful Improvement in Turslide, and D is the turret, which is formed inret Lathes, of which the following is a full, tegral with said base-plate. The base-plate clear, and exact description, reference being rests upon the slide, and a vertical stud F, had to the accompanying drawings. which is secured to the slide, projects through to The objects of the invention are, first, to a tapered axial hole in the base-plate. A taproduce a machine of maximum efliciency pered sleeve), which fits this hole, embraces both with respect to the variety of work it is the stud F and is keyed to it. This sleeve capable of performing and of its adaptability serves as the bearingupon which the baseplate to the use of several tools at one time; secturns. It is provided on its upper end with a I5 ond, to facilitate the connection of the tools head f, which bears upon the top of the baseand tool-holders to the turret, and as a conplate and holds it down upon the slide, and sequence to simplify the design and constructhis sleeve is held in the desired relation to tion of tools and tool-holders adapted to be the base-plate by a screw f which passes so connected, and, third, to produce as simthroughit and screws into the stud F. This 2o ple and inexpensive a machine as is consistscrew also furnishes means for adjusting cut with the desired efficiency. the sleeve downward to compensate for wear. Theinvention relates, primarily, to the con- The turret is composed of a plurality of prefstruction of the turret, to which most of the erably vertical plates d,whose ends are united, valuable features to be pointed out are due. and the outer and inner faces of each are par- 2 5 It also relates to the mechanism for turnallel. The turret having the described coning the turret automatically when the turretstruction is therefore in a form which may slide is moved back from the work, and also be called a hollow polygon-that is to say, to the indexing mechanism for holding the it is in the form of an equilateral polygon turret in proper position relative to the work. both externally and internally. Through 30 In the drawings, Figure 1 is a longitudinal each of these sides d a holed is formed for section through the turret and turret-slide of the work to pass through, and each of these a lathe embodying our invention, the section holes, when the side in which it is formed is being in the plane indicated by the dotted lines facing the work, is in line with the work-hold- 1 1 of Fig. 4. Fig. 2 is a plan view of the ing spindle, and in each side are also formed 5 turret-slide and the mechanism carried therea plurality of holes (1 The tools or toolby for turning and indexing the turret. Fig. holders may be made fast to any one of the 3 isa plan view of the turret, and Fig. 4: is a sides of this polygonal turret and to either transverse verticalsectionalviewin the plane the outer or the inner face of that side, as indicated by line 4 l of Fig. 1. Fig. 5 is a may be most convenient, by means of screws 0 view of the sliding block G and parts which 5, which pass through these holes d and cooperate therewith from the opposite side to screw into the back plate of the tool or toolthat shown in Fig. 1. holder. It is obvious that when the tools or Referring to the parts by letters, A repretool-holders may be secured to a side of the sents the lathe-bed, which is provided with turret by means of screws passing through 5 45 the usual V-guides a for the turret-slide. said side and screwing into said back plate 13 represents the turret-slide, having coopthe design and construction of the tools or crating V-shaped ways. The mechanism for tool-holders may be greatly'sim'plifi'ed incomcausing this turret-slide to move backward parison to those which must befastened to and forward is no part of the present inventhe turret by means of screws which pass 59 tion, and any suitable mechanism may be through the tool or tool-holder from the front employed. The drawings show for the purthereof and screw into the turret, because the working parts of the tool or tool-holder in such. cases must be so arranged and placed as to leave room not only for the screws themselves, but for a wrench or screw-driver to operate them.

It is apparent that tools and tool-holders may notv only be secured to the outer faces of the turret, but as well to the parallel inner faces thereof. If there should be a piece of work upon which four tools could operate advantageously upon four different parts thereof, these tools could be set tandem, one to the outer face of one side of said turret and one to the inner face thereof, and one to the outer and one to the inner face of the side of the turret diametrically opposite. Of course it will only occasionally happen that four tools thus set can be used advantageously at the same time upon the same piece of work; but it not infrequently happens that two tools may be advantageously used, and with a turret having the construction described these tools may be secured to the turret in such of the four positions referred to as are most suitable.

\Ve are aware that turrets have been constructed that are externally of polygonal form but we do not believe that a turret has heretofore been constructed which is polygonal both internally and externally and the sides of the two polygons are parallel. It is obviously an essential characteristic of a turret having the capabilities described as belonging to that turret which is shown that the internal conformation of the turret be similar to the external conformation and that the inner and outer faces of each side thereof shall be parallel, and in this form of the turret is found the gist of the presentinvention in so far as it relates to the turret itself without respect to its operating mechanism.

lVe will now proceed to describe the mechanism shown for turning the turret to bring the different tools into line with the work and for properly indexing the turret; but it will be understood that the turret itself, having the characteristics heretofore described, is capable of being moved and indexed by various kinds of mechanism.

In a recess 1) in the top of the turret-slide is a sliding block G, which is movable in guideways 0 To the rear end of this block is secured a long tailpiece g, which extends out through the rear end of the turret-slide. A spring 9 of some sort is employed to cause said block to move rearwardly to the end of the recess. This spring may be of any convenient form and may be placed in any convenient position. As a matter of convenicnce the spring employed is a contractile coil-spring which lies in a hole b in the slide and one end is secured to a pin 1), which is fast to the slide. The other end is secured to one end of a lever L, which is pivoted to the slide. The other end of the said lever engages in a slot g in the tailpiece g.

An adjustable abutment M is provided for engagement with the rear end of the tailpiece g when the slide has been moved back to draw the tool oif the work. This abutment is a rod which may be adjusted through the upper end of a standard m, which is secured to a rod Q, which projects from the end of the machine-frame. This abutment-rod may be made fast to the standard by the set-screw m. The abutment is adjustable, so that it may be able to act upon the tailpiece of this sliding block as soon as the tool leaves the work, however far the slide may then have moved back.

On the under side of the base-plate C is a ratchet composed of as many downwardlyprojecting pins K as there are sides to the turret. A pawl H is mounted upon the slidin g block G-that is to say, it is secured to a stud h, which is rotatably mounted in the block and a rat-trap spring h, acting upon the lower end of this stud, acts to so turn it as to move the pawl into the position shown in the drawings, where it is stopped by the engagement of the pawl with ashoulder g on the block G. IVhen in this position, it is adapted to engage with one of the pins on the turret baseplate. The end of this pawl which faces these pins has a notch 7L3, which is adapted to take over the pin when the sliding block is moved toward it.

In the turret base-plate there are as many tapered holes 0' as there are sides to the turret. In the turret-slide is a vertically-movable indexing-pin N, having a tapered upper end 71, which is adapted to enter these holes. An expansion coil-spring it lies in a hole n in the pin and is compressed between the upper end of this hole and a plate I), secured across the lower end of the holes. This spring therefore acts to move the indexing-pin upward whenever it is permitted to so move. A lever P is pivoted to the turret-slide and enters a slot 72. in the indexing-pin, whereby it may move said pin. The other end of this lever has a laterally-projecting pin 1), which is adapted to engage with a cam-shaped projection r on the side of the lever B, which is pivoted to the sliding block on a horizontal pivot 1''. When the turret-slide moves backward, the tailpiece of the sliding block engages with the abutment, the result being that said sliding block is stopped, while the slide continues its rearward movement. The end of the pawl II engages with the proper pin K on the turret and causes it to turn. Just before this engagement of the pawl and pin the cam-shaped projection 0' just referred to engages beneath the projecting pin 1) on the lever P, and as it moves under this projecting pin it rocks the lever and withdraws the indexing-pin from the hole in the turret base-plate, and the pin is held down until the turretslide completes its backward movement and the turret is turned to bring the next tool into line with the work. Just at this point the pin 1) 011 the lever P reaches the rear end of the cam-shaped projection 1',

and thereupon the spring which actuates the indexing-pin acts to move it up into the hole in the turret, thereby properly indexing the turret, and at the same time the pin 1) on the lever moves down behind this cam-shaped projection. When the turret-slide now moves forward toward the work, the spring g moves the sliding block backward upon the slide, whereupon the projecting pin on the lever passes under this cam-shaped projection r, the lever B, to which it is attached, being swung upon its pivot to permit it to so pass.

Having described our invention, what we claim as new, and desire to secure by Letters Patent, is

1. A lathe-turret, consisting of a base-plate capable of being rotatably supported on the turret-slide, and a plurality of connected plates which are fast to the outer face of said base-plate, and have parallel outer and inner faces, and are symmetrically arranged about the axis of the base-plate whereby to form an equilateral polygon both internally and externally, each of said sides being provided with a hole for the passage of the work, and with means whereby a tool may be attached as well to the inner as to the outer face thereof, substantially as and for the purpose specified.

2. In a turret-lathe, a base-plate capable of being rotatably mounted on the turret-slide, combined with a hollow polygonal turret whose sides are rigid with the base-plate and have parallel outer and inner faces, each side having a hole for thepassage of the work, and other holes for the passage of screws for fastening the tools thereto, substantially as and for the purpose specified.

In a turret-lathe, the combination of a turret-slide, with a turret base-plate rotatably mounted thereon, and a hollow polygonal turret composed of a plurality of equal sides whose outer and-inner faces are parallel, each side having a hole for the passage of the work and other holes for the passage of tool-fastening screws, substantially as and for the purpose specified.

4. In a turret-lathe, the combination of a turret-slide, and a turret base-plate rotatably mounted thereon and having a ratchet on its under side, witha sliding block mounted in theturret-slide, and adapted to slide lengthwise thereof, and having a stem which projects from the rear end of the slide, a springpawl pivoted to the slide and adapted for e11- gagement with said ratchet and an adjnstable abutment adapted to engage with the stem of the sliding block whereby said block is caused to come to rest during the rearward movement of the slide, substantially as and for the purpose specified.

5. In a turret-lathe, the combination of the turret-slide and a turret base-plate rotatably mounted thereon, and having on its under side a plurality of vertical pins, with a slid ing block mounted on the turret-slide, a stem secured to said blockand extending beyond the rear end of the slide, a springpawl mounted on the top of said block and having a concave front end for engagement with said pins, a lever engaging with said stem, and a spring for operating said lever, and an ad justable abutment for the stem of said block whereby the block will be brought to rest while the slide is moving rearward, substantially as and for the purpose specified.

In testimony whereof we hereunto affix our signatures in the presence of two witnesses.

Witnesses:

WM. E. REID, JOHN WEBER. 

